What is a common welding hazard?

Welding on closed containers presents a significant hazard because it can lead to explosions. When welding is performed on a container that is sealed or contains flammable liquids or gases, the heat generated can create increased pressure within the container. If there is any combustible material inside, the sparks or molten metal produced during the welding process can ignite these vapors, resulting in an explosion. This is why it is critical for welders to ensure that containers are either properly ventilated or emptied of any hazardous materials before beginning their work. Recognizing and mitigating this risk is essential to maintaining a safe working environment in welding operations.